I follow a number of different sites and blogs in the game design community. Below is a list of the more commonly visited places you may find additional help and inspiration when coming up with your next game.
Board Game Designers’ Forum focuses heavily on providing quality feedback for tabletop game drafts. Past posts have covered topics diverse as card design and readability, theme selection, best practices for rulebooks, organizing playtests, soliciting reviews, and other important topics. The site is active, with anywhere from 4-8 new threads or replies (with feedback or questions) each day, making it a good resource to check in on often. I post there under my Werhner handle.
Board Game Design Lab is a huge resource, with lots of podcasts, as well as links to practical prototyping and playtesting ideas. It has some material from well-received game designers.